Teoria de campo de corda bosônica e considerações sobre possíveis extensões

Abstract

We present a formulation proposed by E. Witten of a string field theory, the study about tachyon condensation and a possible formulation, by using thermal field dynamics, of a string field theory at finite temperature. But for this, we introduced the bosonic string theory, from a classical and quantum point of view, the Conformal Field Theory, the operator product expansion, the path integral string theory formulation, the string BRST quantization, thermal field dynamics, the extended string field and its equation of motion